convert dual audio rm to single audio dvd?

[thecalip]

I am trying to convert some RM dual channel to DVD signal channel.

I understand the way to do it is rip the audio from the source, and map the channel, convert it, and then merge back with the source, and finally convert to DVD. This take way too much time.

My question is there an easier/faster way to do it? Other than the solution to unplug one audio cable from the player.

Thanks in advance.